Clear fused quartz GE 124, 100mm wafers from stock by Valley

GE 124 Fused Quartz 100 mm Wafers to SEMI Specifications

When naturally occurring Crystalline Silica
(Silicon Dioxide-SiO2) in the form of stone,
sand or rock is melted,
the resulting material is called Fused Quartz. The clear variety is known as clear
Fused Quartz.

This is not to be confused with Fused Silica which is manufactured from
synthetically derived Silicon Dioxide and is technically referred to as synthetic
Fused Silica. However, in many applications, Fused Quartz and Fused Silica can be
used interchangeably. The main differences are that Fused Quartz has much lower OH
content (<100ppm) and Fused Silica transmits somewhat better in the UV.

Fused Quartz is a high purity material, and has high chemical resistance, good
thermal shock resistance, strong compression characteristics, and low thermal
expansion coefficient. Fused Quartz wafers, windows and substrates can be used
for mirrors, viewing windows, optical flats, insulators and other optical,
electronic and semiconductor applications.